Wear ring and locking nut structure for gyratory crushers



May 10, 1966 1.. B. OLSON 3,250,473

WEAR RING AND LOCKING NUT STRUCTURE FOR GYRATORY CRUSHERS Filed Nov. 22,1963 2 Sheets-Sheet 1 xln i i S y 1966 1.. B. OLSON 3,250,478

WEAR RING AND LOCKING NUT STRUCTURE FOR GYRATORY CRUSHERS Filed Nov. 22,1963 2 Sheets-Sheet 2 f I .21 I .3

INVENTOR.

United States Patent 3,250,478 WEAR RING AND LOCKING NUT STRUCTURE FORGYRATORY CRUSHERS Lawrence B. Olson, Milwaukee, Wis, assignor tolflordberg Manufacturing Company, Milwaukee, '15., a

corporation of Wisconsin Filed Nov. 22, 1963, Ser. No. 325,59i) 7Claims. (Cl. 241-215) This invention relates to an improvement ingyratory crushers and has for a particular purpose the provision of animproved holding means for the mantle of a gymtory crusher having agenerally conic head.

Another purpose is to provide an improved wear ring for holding thecrusher mantle in place and for absorbing wear and for protecting thelocking nut of the crusher head.

Another purpose is to provide such a wear ring which, while massive andwear resistant, can readily be removed and replaced when worn.

Another purpose is to provide an improved locking nut and wear andthrust ring assembly for such crushers.

Another purpose is to provide means effective to maintain the necessarydownward thrust against the upper edge of the crusher mantle, whileprotecting the locking nut or locking assembly,

Other purposes will appear from time to time in the course of thespecification, claims and drawings.

The invention is illustrated more or less diagrammatically in theaccompanying drawings wherein:

FIGURE 1 is a vertical section through a crusher of the type describedillustrating the invention;

FIGURE 2 is an enlarged section through a portion of the crusherillustrating one form of the invention;

FIGURE '3 is a section, similar to FIGURE 2, showing a modified form ofthe invention;

FIGURE 4 is a section, similar to FIGURE 2, showing yet a further formof the invention; and

FIGURE 5 is a section, similar to FIGURE 2, showing still a further formof the invention.

Like parts are indicated by like symbols throughout the specificationand drawings.

Referring to the drawings, it will be understood that the details of thecrusher frame do not of themselves form part of the present invention.It includes, however, a circumferential outer frame member and a centralhub 11, which may be suitably connected by supporting means, not hereinshown. Rotatable in the hub 11 is an eccentrically apertured sleeve 12which may be suitably rotated through a drive, not herein shown in detail, since it does not of itself form part of the present invention. Itwill be understood that the sleeve 12 is eccentrically apertured toreceive a crusher shaft 13 upon which is mounted a crusher head 14. Theshaft includes also an upward extension 15, externally screw-threaded asat 16. A mantle 17 isnormally seated on the outer conic face 17a of thehead 14.

Surrounding the mantle 17 is a bowl liner 20 which, with the mantle,defines a crushing cavity. The bowl liner may be supported on a bowl 21,which, in turn, is preferably adjustably secured to a bowl ring 22,movably mounted on the upper edge of the outer circumferential framemember 10.

In the use of the device it will be understood that as the eccentricsleeve 12 rotates the shaft 13 is gyrated. The effect is to move anypoint of the mantle 17 toward and away from the opposite surface of thebowl liner 20, to provide the crushing nip effective to crush materialfed downwardly into the crushing space defined by the mantle and bowlliner. It is exceedingly important to hold the mantle 17 firmly inposition on the crushing head 14 and,

also, to take up any loosening or expansion or distortion of the mantle.Such mantles'are frequently, even customarily, made of manganese steelwhich tends to peen or deform or stretch somewhat under impact.

In order to hold the mantle in position and take up any such change inform I employ a locking nut, generally indicated at 25, which isthreaded onto the extension 15. It will be understood that by rotationof this locking not a downward thrust against the upper edge of themantle 17 can be maintained. It is important, however, that this thrustbe constantly and uniformly maintained. I find it advantageous to employa massive thrust ring 28 which is formed to engage the upper edge of themantle 17 and an appropriate face 25a of the locking nut 25, to providea direct thrust between the lower or thrusting surface of the lockingnut and the upper or thrust receiving surface of the mantle 17. Asshown, the ring 28 may be thicker than the mantle.

With reference, for example, to the form of FIGURE 2, the lower edge ofa thrust ring 30 is provided with a generally conic thrust surface 31which may be generally perpendicular to the outer conic surface of themantle 17. Similarly, another conic surface 32, on the upper edge of thering 30, is opposed to the generally conic surface 25a on an upward andoutward projection of the locking nut 25. Since, as is clear from thedrawings, the ring 30 is in the line of flow of material into thecrushing cavity, and is therefore subjected to continuous wear, it isimportant that this ring he of abrasion resisting material, and be ofsubstantial mass. I find that a practical material is manganese steel,although other wear resistant materials such as high carbon chrome maybe satisfactory. It is important that the ring 30 engage the conicsurface 25a of the locking nut and the upper conic surface 17a of themantle, but be otherwise free from contact with the head or the lockingassembly. Thus I provide between the upper, inner portion of the ring 30and the opposed parts of the locking nut 25 a free space 30a. The thrustconnections of the ring are therefore limited to the areas of its upperconic surface 32, and its lower conic surface 31. It is of suificientmass to stand the battering which it will inevitably get, and it can, ofcourse, be readily re moved and replaced by the suitable upwardwithdrawal of the locking nut 25. Lugs 33, illustrated in dotted linesin FIGURE 2, may be provided on the ring 30, if desired.

With reference to the form of FIGURE 4, I illustrate a correspondingthrust ring 40 with a lower thrust surface 41 and an upper thrustsurface 42. Free space 40a is provided between the ring 40 and the stemof the locking nut 25. Lugs 43, illustrated in dotted lines, may beprovided if desired.

It will be observed that in both forms the rings 30 and 40 contact onlythe thrusting surface of the locking nut and the thrust receivingsurface of the mantle. It will also be observed that these thrustreceiving surfaces are all generally conic and are all generallyperpendicular to the generally conic wearing surface of the mantle.

With reference to the form Of FIGURE 3, I find that, under somecircumstances, it is practical and advantageous to employ the ring 30-or its equivalent, not merely to exert a thrust against the upper edgeof the mantle but to protect the locking nut 25 from any substantialbattermg or wear by the material passing into the crushing cavity orundergoing crushing. I therefore employ a thrust ring 50 which may beidentical with the ring 30 except that it is extended upwardly andinwardly, as at 51, to provide, in effect, a shield for the upperportion of the locking nut. Between this shield portion and the upperpart of the locking nut I may leave a space 52. This space, if leftopen, will :tend to fill up with dust or particles of the material beingcrushed. I find that it may be advantageous to fill this open space witha mateassen /a 3 rial which can be readily poured, such as zinc, pouredin liquid form, or a plastic, such as the plastic sold under thetrademark Nordback. This material flows easily and sets promptly, andhardens into a firm mass of suflicient strength and abrasion resistanceto protect the locking nut.

Referring to FIGURE 5, I illustrate a .variant form of ring 60 whichconstitutes a modification of the ring 40 of FIGURE 4. It includes anupward extending shield portion 61 which defines, with the upper part ofthe locking nut 25, an open space 62. As in the form of FIG- URE 3, thisspace may also be filled, for example with zinc, or with a suitableplastic.

In both the forms of FIGURES 3 and 5, the locking nut 25 may haveoutwardly extending lugs 55 which are effective to interlock the nutwith the rings 50 and 60 through grooves or cavities 56 in the adjacentsurfaces of the nut. The ring and nut will then rotate together. In likemanner there may be a similar lug and cavity interlock between the rings50 and 60 and the mantle v17 for simultaneous rotation of these members,for example as at 63, in FIGURE 5, which fits in a socket 64 in the rearof face 17a on the mantle. The lug or projection 63 may be integral withring 60 or it may be separately formed and welded on.

It will be realized that, whereas I have described and illustrated apractical and operative device, nevertheless many changes may be made inthe size, shape, number and disposition of parts without departing fromthe spirit of my invention. I therefore wish my description and drawingsto be taken as in a broad sense illustrative or diagrammatic, ratherthan as limiting me to my precise showing.

What is claimed is:

1. In a gyratory crusher having a crushing cavity defined by a bowlliner and mantle, and for use between the mantle and locking nut of sucha gyratory crusher, the mantle having an upwardly and outwardlyextending generally conic top thrust receiving surface, the locking nuthaving an upwardly and outwardly extending and downwardly facinggenerally conic thrust delivering surface, a massive wear receiving ringopposed to the bowl liner adapted to be positioned therebetween, saidring having a lower conic surface conforming to the upper surface of themantle and an upper conic surface conforming to the thrust surface ofthe locking nut, said ring having a lower portion surrounding andadjacent but spaced outwardly from the opposed lower portion of thelocking nut.

2. The structure of claim 1 characterized by and including an interlockbetween the wear ring and the mantle.

3. The structure of claim 2 characterized by and including interlocksbetween the wear ring and the mantle delivering surface, a massive wearreceiving ring adapted to be positioned therebetween, said ring having alower conic surface conforming tothe upper surface of the mantle and anupper conic surface conforming to the thrust surface of the locking nut,the wear ring including a shield portion extending upwardly about thelocking nut and formed and adapted to protect the exterior of thelocking nut from material entering the crushing cavity.

6. The structure of claim 5 further characterized by the use of a bodyof filling material located in a space between the shield portion of thewear ring and the upper outer surface of the locking nut. t

7. For use between the mantle and locking nut of a gyratory crusher, themantle having an upwardly and outwardly extending generally conic topthrust receiving surface, the locking "nut having an upwardly andoutwardly extending and downwardly facing generally conic thrustdelivering surface, a massive wear receiving ring adapted to bepositioned therebetween, said ring having a lower conic surfaceconforming to the upper surface of the mantle and an upper conic surfaceconforming to the thrust surface of the locking nut, the wear ring beingsubstantially thicker than the mantle, the wear ring including-a lowerportion surrounding and adjacent but spaced outwardly from the opposedlower portion of the locking nut.

References Cited by the Examiner UNITED STATES PATENTS 2,634,061 4/1953Rumpel 241-214 2,635,818 4/1953 Zoerb 24l299 X 2,814,450 11/1957Gruender 241-208 X 2,971,705 2/1961 Werner 241-300 X ROBERT C. RIORDON,Primary Examiner.

J. SPENCER OVERHOLSER, LESTER M. SWINGLE,

Examiners.

D. KELLY, Assistant Examiner;

1. IN A GYRATORY CRUHSER HAVING A CRUSHING CAVITY DEFINED BY A BOWL LINER AND MANTLE, AND FOR USE BETWEEN THE MANTLE AND LOCKING NUT OF SUCH A GYRATORY CRUSHER, THE MANTLE HAVING AN UPWARDLY AND OUTWARDLY EXTENDING GENERALLY CONIC TOP THRUST RECEIVING SURFACE THE LOCKING NUT HAVING AN UPWARDLY AND DOWNWARDLY EXTENDING AND DOWNWARDLY FACING GENERALLY CONIC THRUST DELIVERING SURFACE, A MASSIVE WEAR RECEIVING RING OPPOSED TO THE BOWL LINER ADAPTED TO BE POSITIONED THEREBETWEEN, SAID RING HAVING A LOWER CONIC SURFACE CONFORMING TO THE UPPER SURFACE OF THE MANTLE AND AN UPPER CONIC SURFACE CONFORMING TO THE THRUST SURFACE OF THE LOCKING NUT, SAID RING SPACED A LOWER PORTION SURROUNDING AND ADJACENT BUT SPACED OUTWARDLY FROM OPPOSED LOWER PORTION OF THE LOCKING NUT. 